Use 10 1/2 x 15 1/2 sheet pan. Make cake mix, bake, cool. Beat together ... Refrigerate. Can be made day before. Bake at 350 degrees for 28 to 34 minutes.
Combine flour, sugar and salt. ... Bake on cookie sheet at 350 degrees for 20 ... consistency to spread. Beat until smooth. Spread on cooled sheet cake.
Ingredients: 15 (cocoa .. eggs .. flour .. milk .. salt .. soda ...)